Skip to Main Content

Select country

Select your country

Scheduled Proficiency Testing & PT Express™ 

As a leader among proficiency testing providers, we are proud to offer NSI Lab Solutions ISO 17043-accredited proficiency testing to environmental, food science, and cannabis/hemp testing laboratories. Our accredited PTs are also available through our on-demand PT Express version, allowing you to receive your final graded report within 48 hours after submitting results — no scheduled test selection required.

Past report copies and data entry are available 24/7 using our secure online PT Datalink. Scheduled proficiency testing is also available throughout the year. You may also be interested in our analytical reference materials.

Download Our Proficiency Testing Brochure

DOWNLOAD BROCHURE

Search by Category

Environmental

Our studies include all analytes required by TNI fields of testing. All quantitative samples are supplied in duplicate.

Food & Agriculture

NSI Lab Solutions Food Microbiology Proficiency Testing (PT) studies are designed for your convenience and success.

Cannabis & Hemp

Cannabis & Hemp proficiency testing studies are designed for your convenience and success.

Categories and filters

Filter / Sorting

Categories

Brand

Classification

Accreditations

Product Type

Regulatory Method

Instrument / Test

Analyte - Single / Multi

CAS #

Strain

Analyte / Component

Microorganism

769 Items found

Per Page:
Sort by:
Trace Metals (2 pack) Trace Metals (2 pack)
SKU: PEI-034

Trace Metals (2 pack)

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Total Residual Chlorine (2 pack) Total Residual Chlorine (2 pack)
SKU: PEI-033

Total Residual Chlorine (2 pack)

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Total Phenolics (2 pack) Total Phenolics (2 pack)
SKU: PEI-032

Total Phenolics (2 pack)

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Amenable and Total Cyanide (2 pack) Amenable and Total Cyanide (2 pack)
SKU: PEI-031

Amenable and Total Cyanide (2 pack)

  • CCL
Login to view pricing
  • Brand NSI
  • Concentration 0.1 - 1 mg/L
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Oil and Grease (2 pack) Oil and Grease (2 pack)
SKU: PEI-029

Oil and Grease (2 pack)

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Demand (2 pack) Demand (2 pack)
SKU: PEI-026

Demand (2 pack)

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
EPA WS Inorganics Kit EPA WS Inorganics Kit
SKU: PEI-020K

EPA WS Inorganics Kit

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Full NELAC WS Inorganics Kit Full NELAC WS Inorganics Kit
SKU: PEI-018K

Full NELAC WS Inorganics Kit

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Inorganic Disinfection By-Products Drinking Water Inorganic Standard Inorganic Disinfection By-Products Drinking Water Inorganic Standard
SKU: PEI-017

Inorganic Disinfection By-Products Drinking Water Inorganic Standard

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Trace Metals Drinking Water Inorganic Standard Trace Metals Drinking Water Inorganic Standard
SKU: PEI-016

Trace Metals Drinking Water Inorganic Standard

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Cyanide Drinking Water Inorganic Standard Cyanide Drinking Water Inorganic Standard
SKU: PEI-015

Cyanide Drinking Water Inorganic Standard

Login to view pricing
  • Brand NSI
  • Certification Single: Grav. w/Analytical Confirmation
  • Concentration 0.1 - 0.5 mg/L
  • Raw Material >95% min; as available
Turbidity Drinking Water Inorganic Standard Turbidity Drinking Water Inorganic Standard
SKU: PEI-014

Turbidity Drinking Water Inorganic Standard

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
AlertAlertBrowse fileDownload fileFileImagePdfWordTextExcelPowerpointArchiveCsvAudioVideoSpinnerCalendarReturn arrowMinusVisibleInvisibleVisibleInvisibleConfigure